Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 349

The packets are forwarded to the appropriate fabric queue according to the traffic
class/color combination. On a transit router, when the packet is forwarded out of
the tunnel, the router-generated output policy then sets the EXP bits back according
to the traffic class/color combination. Typically, the effect of the EXP bits to traffic
class/color combination to EXP bits is no change.
On an egress router, where the tunnel terminates, no router-generated output policy
is attached, and the packets pass out of the router subject to any manually configured
IP policy management applied to their traffic class/color combination.
See the JUNOSe Policy Management Configuration Guide for more information
Related Topics
about defining policies.
Configuring MPLS and Differentiated Services on page 299
Configuring EXP Bits for Differentiated Services on page 300
Example Differentiated Services Application and Configuration on page 300
Classifying Traffic for Differentiated Services on page 303
mark-exp
mpls classifier-list
mpls diff-serv phb-id traffic-class
mpls match exp-bits
mpls match traffic-class
mpls policy-list
mpls policy-statistics
mpls traffic-class
tunnel mpls diff-serv phb-id
Example Traffic Class Configuration for Differentiated Services
Chapter 3: Configuring MPLS
313